# include <iostream>
using namespace std;
int main(){
    int n, step = 0;
    cout << "Please input a number:" << endl;
    cin >> n;
    while(n != 1){
        if(n % 2 == 0)
            n /= 2;
        else
            n = (3 * n + 1) / 2;
        step++; 
    }
	cout << "the step is:" << step << endl;
    return 0;
}
